25542320 has 20 divisors (see below), whose sum is σ = 59386080. Its totient is φ = 10216896.

The previous prime is 25542299. The next prime is 25542329. The reversal of 25542320 is 2324552.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×25542320² = 1304820221964800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25542329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159560 + ... + 159719.

It is an arithmetic number, because the mean of its divisors is an integer number (2969304).

Almost surely, 2^25542320 is an apocalyptic number.

25542320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25542320 is an abundant number, since it is smaller than the sum of its proper divisors (33843760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25542320 is a wasteful number, since it uses less digits than its factorization.

25542320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319292 (or 319286 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 25542320 is about 5053.9410364586. The cubic root of 25542320 is about 294.5010045480.

Adding to 25542320 its reverse (2324552), we get a palindrome (27866872).

The spelling of 25542320 in words is "twenty-five million, five hundred forty-two thousand, three hundred twenty".